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11. Modbus RTU commissioning, step-by-step
guides
11.1 Hardware setup, CIM 200
11.2 Hardware setup, CIU 200
If the sensor configuration is changed, restart the
CIM module or CIU unit to ensure a correct scaling of
the sensor value.
Step Action
1 Install CIM 200 in the Grundfos booster system according to the booster system documentation.
2
Complete the booster system configuration, for example sensor configuration and local mode.
This can be done either on the booster system control panel, via Grundfos GO Remote or Grundfos PC Tool E-Products.
3 Select the Modbus slave address (1-247).
4 Select the bit rate of the Modbus slave.
5 Select parity and stop bits of the Modbus slave, even parity with 1 stop bit or no parity with 2 stop bits.
6 If necessary, set line termination.
7 Connect the necessary cables from CIM 200 to the Modbus network.
8
Confirm that the GENIbus LED is permanently green and that the Modbus LED is either off, if no master is actively polling
the slave, or flashing green, indicating error-free communication.
CIM 200 is now ready to be accessed via the Modbus network.
Step Action
1
Complete the booster system configuration, for example sensor configuration and local mode.
This can be done either via Grundfos GO Remote or Grundfos PC Tool E-Products.
2 Select the Modbus slave address (1-247).
3 Select the transmission speed of the Modbus slave.
4 Select parity and stop bits of the Modbus slave, even parity with 1 stop bit or no parity with 2 stop bits.
5 If necessary, set line termination.
6 Connect the GENIbus cable from CIU 200 to the booster system.
7 Connect the necessary cables from CIU 200 to the Modbus network.
8 Connect the power cable to CIU 200, and switch the unit on.
9
Confirm that the GENIbus LED is permanently green and that the Modbus LED is either off, if no master is actively polling
the slave, or flashing green, indicating error-free communication.
CIU 200 is now ready to be accessed via the Modbus network.
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